Indian-built Arihant nuclear submarine activated

India has activated the reactor on board the INS Arihant nuclear submarine, the first to be designed and built in India.

The move means the submarine can now undergo sea trials.

Prime Minister Manmohan Singh hailed the "giant stride in... our indigenous technological capabilities".

Experts say is the first ballistic missile submarine known to have been built outside the five recognised nuclear powers.
[link to www.bbc.co.uk]
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